21st.dev vs Exogram Authority Runtime

In-depth architectural comparison of the 21st.dev and Exogram Authority Runtime MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

2

Choose 21st.dev when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore 21st.dev Details

Choose Exogram Authority Runtime when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Exogram Authority Runtime Details

Feature & Specification Comparison

Specification	2 21st.dev Developer Tools	Exogram Authority Runtime Developer Tools
Summary	Search 21st.dev UI components & themes, get their code, and generate new ones with 21st AI.	Model Context Protocol server for the Exogram Authority Runtime.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "21st-dev": {
      "url": "https://21st.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "exogram-authority-runtime": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-memory"
      ]
    }
  }
}

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